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A050836
Numbers n such that 169*2^n-1 is prime.
0
1, 5, 11, 17, 67, 137, 157, 203, 209, 227, 263, 917, 1039, 2581, 3659, 3691, 4337, 8249, 8927, 9749, 20807, 33439, 158003, 192323, 458099
OFFSET
1,2
PROG
(PARI) is(n)=ispseudoprime(169*2^n-1) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A246704 A095183 A018730 * A058019 A182482 A075582
KEYWORD
hard,nonn
AUTHOR
N. J. A. Sloane, Dec 29 1999
EXTENSIONS
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
STATUS
approved